From 748e71e8f4356ac3ce1313e473aa000118c1e109 Mon Sep 17 00:00:00 2001
From: Oliver Schneider <git-no-reply-9879165716479413131@oli-obk.de>
Date: Wed, 11 Apr 2018 13:31:51 +0200
Subject: [PATCH] Reduce the number of calls to `cdata`

---
 src/librustc_metadata/decoder.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/librustc_metadata/decoder.rs b/src/librustc_metadata/decoder.rs
index c69ee180dc9c9..936d680380c99 100644
--- a/src/librustc_metadata/decoder.rs
+++ b/src/librustc_metadata/decoder.rs
@@ -185,8 +185,8 @@ impl<'a, 'tcx> DecodeContext<'a, 'tcx> {
         if let Some(index) = self.interpret_alloc_index.as_mut() {
             return index[idx] as usize;
         }
-        let index = self.cdata().root.interpret_alloc_index;
-        let index: Vec<u32> = index.decode(self.cdata()).collect();
+        let cdata = self.cdata();
+        let index: Vec<u32> = cdata.root.interpret_alloc_index.decode(cdata).collect();
         let pos = index[idx];
         self.interpret_alloc_index = Some(index);
         pos as usize